If I'm already on the runway with a P&H clearance, I already did the LCA.
BT

P&H should be replaced by a directive to pilots to plan for an
immediate departure upon receiving "clear for takeoff" instructions.
Stopping on the numbers then doing a checklist is just out. By the
time you're holding short, you should be ready for Lights, Camera,
Action the moment the tower tells you to.

IMHO.

Ben Hallert
PP-ASEL
http://hallert.net/cozy/